Means for utilizing oil or gas in ore-reducing furnaces.



I No. 741,504. v PATENTED OCT. 13, 1903. I w. KEMP. MEANS FOR UTILIZING OIL 0R GAS IN ORE. REDUCING FURNACES.

APPLICATION TILED we. 7. 1902.

no MODEL. 2 SHEETS-SHEET 1.

WITNESSES: INVENTOH 116mm fii'rrz u Arm/m5 m: uonms PETERS co. P'Hom-Ln'nq, WASNINGYON. D. c.

PATENTED OUT. 13, 1903'.

7 w. KEMP. MEANS FOR UTILIZING OIL 0R Imam ORE REDUCING FURNACES.

APPLICATION FILED AUG. 7. 1902.-

2 SHEETS-SHEET 2.

N0 MODEL.

W/ TNE SSE S:

ivo. 741,504.

UNITED STATES rammed October 13, 1903.

PATENT OFFICE.

. WILLIAM KEMP, OF TUCSON, ARIZONA TERRITORY, ASSIGNOR on TWO- THIRDS TO MERRILL P. FREEMAN ARIZONA TERRITORY.

AND BURT L. WORTHEN, OF TUCSON,

MEANS FOR UTILIZING OIL 0R GAS lN ORE-REDUCING FURNACES.

SPECIFICATION forming part of Letters Patent No. 741,504, dated October 13, 1903.

Application filed August 7 1902.

To all whom it may cancer-11).

Be it known that I, WILLIAM KEMP, a citizen of the United States, and a resident of Tucson, in the county of Pima and Territory in a combustion-chamber; to provide for thecirculation of the air-blast around the shell of the combustion -chamber, so as to afiord protection to the shell against the intense heat in the furnace; to provide means for regulating the inflow of air and the liquid or.

gaseous fuel independently of each other, to

the end that an intense or modified heat may be produced and the parts are normally un der control of an attendant, and to simplify the construction in a way to promote the. du' rability and reduce the cost of installation and repairs. With these ends in view the invention con sists in the novel combination of devices and in the construction and arrangement of parts, as will be hereinafter fully described.

The actual scope of the invention will be defined by the claims. r Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding partsih both the figures.

Figure 1 is a sectional elevation of a part of an ordinary ore-reducing furnace embodying my improved means for utilizing oil or gas as a means for intensifying the heat in the combustion-chamber of the furnace; and Fig.

v 2 is an enlarged vertical sectional view through one of the vapor-burners, parts thereof being shown in elevation and other parts in section;

The water-jacket 0b of the ordinary ore-reducing furnace is formed between the exterior shell b and the inner lining c. The farnace is provided with an ordinary charging- Serial No. 118,746. on; ma.)

:door d, and around the furnace is arranged the main'blast-pipe e, from which extends a series of twyer-pipes f, the latter communicatingwith the wind-box g, which is arranged to supplythe twyer of the furnace. All these parts are of the usual or any preferred construction, and they may be modified as desired.

In connection with the wind-box and the twyer-openingsof the blast-furnace'I employ one or a series of burners adapted to consume gaseous fuel or a hydrocarbon, and inFig. 1 ofthe drawings Ihave shown the ore-reducing furnace as equipped with a series of three burners, one of which is shown in end view, while the two remaining burners are shown in vertical sectional elevation. These burners in construction and installation are identically the same, so that a description of one will answer for each of the others.

In the twyer-opening is arranged a shell 5,

adapted to form a combustion-chamber for the fuel and air supplied thereto by devices of my invention. This shell 5 of the com-' bustion-chamber may be of any desired shape in cross-section-such,-for exam ple,as square, rectangular, or otherwise-but as shown by the drawings the shell is cylindrical and open at its inner end. The shell is preferably made of metal and provided at itsouter end with a head 6, the latter having a large central opening 7. To protect the shell from the deteriorating influence of heat in the furnace, it is provided with a refractory lining 8, which may consist of fire-brick, clay, or other suitable material, and this lining is arranged to extend across the head 6 on the interior thereof, the end portion of the lining having an opening 8 coincident with the opening 7 in the head of the shell. The width or diameter of the shell is less than that of the twyer-opening in which the shell is arranged, and this shell is thus supported in the twyer-opening by a plurality of lugs 9,

which extend radially from the shell'and are adapted to be secured within the twyer-opening by any approved means. This arrangement of the shell in the twyer-opening provides a surrounding or annular passage 10,

which has direct communication with the wind-box g and with a working chamber h of the furnace.

11 designates the fuel-supply pipe, which extends through the wind-box g and is provided with an elbow 12, the upper end of which is attached in a suitable way to the coupling 13. In one end of this coupling is secured the fuel pipe or tube 14 of the burner; but the other end of the coupling-is closed by means of a gland 15, which is arranged to inclose a head 16 in such a way as to form a chamber adapted to receive a packing 17. (See Fig. 2.) Through the head 16, packing 17, and the gland 15 is passed an air-supply tube 18, the latter being of suflicient length to extend entirely through the fuel-tube 14 and the outer side of the Wind-box g. The inner extremity of this air-tube 18 is enlarged or flared in order to form a valve member 19, the same being disposed beyond the inner extremity of the fuel-tube 14, the latter being formed in such a way as to produce a seat for the valve member 19. This air-tube 18 is also provided at a point beyond the gland 15 with a port or opening 20, which lies within the wind-box g and allows the air or blast to pass directly from the windboxinto the air-tube. The air-tube is furthermore provided with a male screw-thread 21 on that part thereof which is exposed beyond or outside of the wind box, and on this threaded part of the air-tube is screwed an adjusting-nut 22, the latter being held or confined in the forked or slotted end 23 of a bracket 24:, which is supported in a stationary position outside of the wind-box-as, for example, by attaching the bracket to the fuelsupply pipe 11. The nut 22 is always exposed for convenient access by an operator, and this nut maybe turned within the forked or slotted bracket in a manner to adjust the air tube 18 in the direction of its length, thereby regulating the position of the valve member 19 with relation to the inner end of the fuel tube or pipe 14 of the burner.

25 designates a valve-stem which extends longitudinally through the air-tube 18, and the inner end of this stem is provided with a valve 26, the latter having a flared or conical face adapted to be seated against the outer face of the valve member 19 on the air-tube 18. The outer end of the valve-stem 25 is prolonged or extended beyond the threaded part of the air-tube 18, and said valve-stem is also provided with an exterior thread 27, which is screwed into a threaded opening provided in the closed end of a cap 28, the latter being in turn screwed on the threaded end 21 of the air-tube. The projecting or exposed end 27 of the valve-stem 25 is provided with a hand-Wheel 29 or other-suitable device for turning the valve-stem, thus making provision for adjustment of the valvestem 25 and the valve 26, so as to regulate the area of the opening through which the air is discharged at the inner end of the airtube 18.

By reference to Fig. 2 it will be seen that the inner end of the fuel-tube 1e and the flared end 19 of the air-tube are extended or carried through the openings 7 8 of the shell 5 and the lining thereof. The inner ends of the fuel and air tubes, comprising parts of the burner, are thus projected well into the combustion-chamber 5 and the air is supplied to the flame at the inner end of the burner through the openings 7 8 and through the inner end of the air-tube 18, thus equalizing the volume and pressure of air which is supplied to the flame. It will be observed also that the valve 26 may be adjusted independently of the air-tube, because the hand-wheel 29 on the stem 26 may be turned in the cap 28, so as to vary the distance of the valve 26 from the flared mouth or valve member 19 of the air-tube. The valve-tube 18 may also be adjusted by turning the nut 22 in a direction to impart endwise movement to the tube 18 and change the position of its nut or valve member 19 with relation to the end of the fuel-tube 14, whereby the control of the fuel and of the air may be changed to admit greater or less volumes of fuel or air, or both, in order to maintain an intense or modified heat in the combustion-chamber 5 In the operation of the furnace the series of burners are employed at the same time that the blast is admitted to the working chamber h. The fuel is carried through the pipe 11 and its elbow 12 to the coupling 13 and through the annular space provided between the tubes 14 18, the fuel finding an exit at the inner end of the tube 14 and around the flared mouth or valve member 19 of the tube 18. The air from the wind-box g is free to pass through the opening 20 into the air-tube 18, and the air under pressure is forced through the flared end or valve member 19 within the annular flame caused by the combustion of the fuel which is supplied by the tube 14. At the same time the air from the wind-box g is free to pass through the openings 7 8 of the shell 5, and thus air is supplied to the flame within and without the same, whereby the combustion of the fuel is maintained to the best advantage within the combustion-chamber 5 The heat and products of combustion are free to pass from the chamber 5 directly into the working chamber h, because the shell 5 is opened at its inner end.

The packing 17 in the coupling prevents 3 the leakage of the fuel into the Wind-box g,

and when the burner is in service the blast from the wind-box g is free to pass into the working chamber h through the passages 10, which surround the shell 5 of the combustionchamber, whereby said shell is in a measure IIO protected from'theaction of the deteriorating influence of the intense heat from the ore under treatment in the working chamber h.

Having thus described my invention, I

5 claim as new and desire to secure by Letters Patent-.-

1. An ore-reducing furnace havinga twyer opening and a combustion-chambersituated in the twyer-opening and communicatingwith lo the working chamber of the furnace and with awind-box, a burner extending into said combustion-chamber, and means for supplying fuel to said burner.

2. An ore-reducing furnace having in addition to "a tWyer-opening and a Wind-box, a

combustion-chamber which is situated within the twyer-opening so as to leave surrounding air-passages which communicate directly with the Wind-box and with the Workin g chamber, a burner extending into said combustionchamber, and means for supplying fuel to the burner.

- 3. An ore-reducing furnace having a-twyeropening and a combustion-chamber situated in a twyer-opening communicating with a wind-box, said combustion-chamber being arranged to form with the twyer-opening an intermediate space which surrounds the chamber, and aburner having tubes extending into the combustion-chamber, one of said tubes being provided with an air-inlet that comm unicates with the wind-box.

4. In an ore-reducing furnace, the combination of a twyer opening, a combustion- 5 chamber situated in a twyer-opening, so as to form therewith an intermediate space which surrounds said combustion-chamber, a burner air-pipe extending into the combustion-chamber and communicating with the chamber of c the wind-box, and means for supplying fuel to the combustion-chamber around the air-exit from the air-tube.

5. In an ore-reducing furnace, the combination of a twyer-opening, a combustio n-chamber situated in a twyer-opening and communicating with a wind-box, saidcombustionchamber being arranged to form with the twyer-opening an intermediate space which surrounds saidchamber, an air pipe or tube also communicating with the wind-box and extending into the combustion-chamber to discharge air directly therein, a surrounding fuel-tube concentric with the air tube or pipe and discharging into the combustion-chamber around the air-inlet afiorded by the tube, and 5 5 means for supplying air from the wind-box directly' to the combustion-chamber around the fuel-tube.

6. In an ore-reducing furnace, incombination, a twyer-opening, a wind-box, a combus: tion chamber in communication with the wind-box, and a burner having a fuel-conduit and an internal air-conduit, said burner being located in said combustion'chamber and adapted to produce a flame which is supplied with air under pressure both internally'and externally by the internal conduit and the combustion-chamber respectively,

7. In an ore-reducing furnace, in combination, a twyer-opening, a wind-box, a combus- 7o tion-chamber located in said tWyer-opening and communicating with the wind-box, an annular burner located in the combustionchamber, means for supplying gaseous fuel to said burner, and an air-conduit in commu nication with the wind-box and located centrally with respect to said fuel-supplymeans of the burner.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. a

WILLIAM KEMP.

Witnesses:

R. V. LANGWORTHY, DALE M. TUssING. 

